MORTGAGE DEBT - Mortgage Debt, Additional Information (Details) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) acquisition property loan	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Debt Instrument [Line Items]
Number of acquisitions partially financed with mortgages | acquisition	4
Number of existing mortgages refinanced | loan	5
Number of properties that acquired supplemental financing | property	1
Gain (loss) on early extinguishment of debt	$ 27.5	$ (45.7)	$ (9.3)
Mortgage debt
Debt Instrument [Line Items]
Weighted-average interest rate of investment debt (as a percent)	4.12%	3.11%
Percent of property level debt with fixed rate (as a percent)	65.00%	78.00%
Percent of property level debt with floating rate and interest caps (as a percent)	27.00%	13.00%
Percent of property level debt with floating rate, without interest caps (as a percent)	8.00%	9.00%
Amount of mortgage paid down	$ 9.1
Collateral amount	7.6
Debt Instrument, Face Amount	$ 165.8
Interest rate (as a percent)	5.50%
Mortgage debt | United Kingdom
Debt Instrument [Line Items]
Gain (loss) on early extinguishment of debt	$ 16.1